LB11870 Datasheet, PDF (9/14 Pages) Sanyo Semicon Device – Three-Phase Brushless Motor Driver for Polygonal Mirror Motors

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Pin No. Pin
Function
LB11870
VREG
Torque command voltage input.
24
TOC ^{This pin is normally connected to the EO pin. When the}
TOC voltage falls, the lower output transistor on duty is
increased.
Equivalent circuit
300Ω
24
FG filter connection.
25
FGFIL ^{If noise on the FG signal input is a problem, insert a}
capacitor (up to about 2200 pF) between this pin and
ground.
VREG
25
VREG
Sets the rotor constraint protection circuit operating time
and the initial reset pulse.
A protection operating time of about 8 seconds can be
26
CSD ^{set by insert a capacitor of about 0.068 µF between this}
pin and ground. If the rotor constraint protection circuit is
not used, insert a resistor and a capacitor in parallel
between this pin and ground. (Values: about 220 kΩ and
4700 pF)
Sets the phase lock state signal mask time.
27
CLD ^{A mask time of about 90 ms can be set by inserting a}
capacitor of about 0.1 µF between this pin and ground.
Leave this pin open if masking is not required.
VREG
300Ω
26
300Ω
27
28
FGS FG Schmitt output
VREG
28
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